Performed parts compatibility effectivity search on serial number for aircraft for #2 VHF communication (transceiver). On initial page at top shows effectivity for aircraft; but beside serial number divided by small space was #3; signifying only for that position. In a hurry to keep aircraft on time I didn't notice that the #3 was not part of the serial number. Continued to place X on line to review possible notes page. When at this page there was no indication of position. So performed operations check on VHF communication per maintenance manual and system operations checked normal. Maintenance control agreed should be ok for service. No replacement part ordered. My off days (saturday and sunday). On apr/sat/06 when another mechanic tried to order replacement part for that position; it would not let him. After 10-15 mins of research; found not effective for position. Notified maintenance control and part was right&right'ed with proper part that same day.

Title: A B737-700 WAS DISPATCHED WITH THE INCORRECT TRANSCEIVER INSTALLED IN THE #2 VHF COM POS. TECHNICIAN HAD TROUBLE DETERMINING CORRECT EFFECTIVITY OF REPLACEMENT UNIT.

Narrative: PERFORMED PARTS COMPATIBILITY EFFECTIVITY SEARCH ON SERIAL NUMBER FOR ACFT FOR #2 VHF COM (TRANSCEIVER). ON INITIAL PAGE AT TOP SHOWS EFFECTIVITY FOR ACFT; BUT BESIDE SERIAL NUMBER DIVIDED BY SMALL SPACE WAS #3; SIGNIFYING ONLY FOR THAT POS. IN A HURRY TO KEEP ACFT ON TIME I DIDN'T NOTICE THAT THE #3 WAS NOT PART OF THE SERIAL NUMBER. CONTINUED TO PLACE X ON LINE TO REVIEW POSSIBLE NOTES PAGE. WHEN AT THIS PAGE THERE WAS NO INDICATION OF POS. SO PERFORMED OPS CHK ON VHF COM PER MAINT MANUAL AND SYS OPS CHKED NORMAL. MAINT CTL AGREED SHOULD BE OK FOR SVC. NO REPLACEMENT PART ORDERED. MY OFF DAYS (SATURDAY AND SUNDAY). ON APR/SAT/06 WHEN ANOTHER MECH TRIED TO ORDER REPLACEMENT PART FOR THAT POS; IT WOULD NOT LET HIM. AFTER 10-15 MINS OF RESEARCH; FOUND NOT EFFECTIVE FOR POS. NOTIFIED MAINT CTL AND PART WAS R&R'ED WITH PROPER PART THAT SAME DAY.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.